Police investigating the death of a man in Bracknell have released new images of people they want to speak to.
It comes after a 34-year-old man was found with a serious head injury in the Twin Bridges Roundabout underpass at around 3.30am on Sunday 25 April.
He was taken to the Royal Berkshire Hospital for treatment, but died in hospital the following Tuesday.
The first scooter rider is believed to have entered the underpass at around 2.27am.
A man arrested on suspicion of manslaughter and theft has been released under investigation, and the three men original arrested on suspicion of murder have been released with no further action to be taken.
I would like to thank the community for their patience and understanding while we have been conducting this investigation. It is understandably concerning for incidents such as this to happen, but the information and help we have received so far has been helpful, and I can reassure the community that we are determined to ascertain the full circumstances that led to Mr de Sousa's death.
The victim has been formally identified as 34-year-old Agapito de Sousa, from Bracknell.
A Home Office post-mortem was conducted earlier this week with the results pending further medical opinion.
Senior Investigating Officer, Detective Chief Inspector Stuart Bosley, of the Major Crime Unit, said: "Our thoughts remain with the family and friends of Mr de Sousa at this extremely difficult time.
"As a result of our investigations so far, we have made a further arrest today and have released three other men without charge.
"We continue to conduct a thorough investigation in order to establish the full circumstances that led to Mr de Sousa's death, and we do not believe there is any wider threat to the local community.
"I would ask the local community to please not speculate as to these circumstances, but if you have any information that can help this investigation, please contact Thames Valley Police on 101, or make a report online, quoting reference number 43210174782.
"We believe Mr de Sousa left a property at around 3am on Sunday riding a white electric scooter with black handles.
"I would again appeal to anybody who believes that they saw Mr de Sousa in the early hours of Sunday, or has any information that can help, to please come forward.
"Cordons that were in place at the Twin Bridges Roundabout underpass and in Binfield Road have now been lifted, but there will be a continued police presence in the area while our investigation continues."